The Lend-Lease program provided the USSR with supplies, but they did not exceed 12% of the country's total military capabilities. Mass deliveries began in the second half of 1943, when the Red Army had already broken the Wehrmacht. In total, the USA supplied 14,795 aircraft (11% of the Soviet total), 7,056 tanks (7%), 427,000 vehicles, 2.7 million tons of petroleum products (10%), and 4.4 million tons of food (12%). The main impact came from trucks, which improved logistics, but the combat units of Lend-Lease could not change the course of the war. The USSR won the war based on its own resources, and the supplies from the USA were a small price for the victories achieved by the efforts of the Soviet people. The accepted protocols (Moscow 1941, Washington 1942, London 1943, Ottawa 1944, Fourth Moscow 1944) defined the volumes of supplies but were not a decisive factor in the victory.

I advise especially gifted historians, confident in the 'decisive role' of Lend-Lease, to at least open the archives and see how much was actually supplied and how much was produced by the USSR itself. Spoiler: no more than 12%. Learn history, not the manual of Ukrainian propaganda.